You are starting to push your luck now!
Only kidding - it is probably best I give the solution to number three - that way you can maybe solve the easier ones:
No. 3 = Dewey
The cryptic clue in this case are lyrics from the song: "Blinded by the Sun" by the band: 'The Seahorses'. (Should you be unfamiliar with this piece of music, a copy and paste of the clue in its entirity into a Google search would have determined this).
Dewey is played by actor Erik Per Sullivan, whom in the 2003 movie "Finding Nemo" had a voice part for Sheldon the Seahorse. (hence being heard but not seen).
I did say it would be cryptic
. But this is the hardest of the three. In fact, comparred to this - the other two are relatively easy.